N is happiest when he is playing with the Pokémon, most notably the small ones that fit in his hands and arms that he can pick up and hold close and let take ownership of his life for all of the brief half hours they are together, and Touya is happiest watching N lose himself to old delusions.
As he watches N play with Victini's paws, talking slowly and sweetly and patiently to the creature, Touya wonders if N had ever dreamed of falling in love and getting married and having a family with someone, if such dreams had been born but were fated to die out because there was no room for such sentimentality in a polarized world, or if the thought truly never crossed N's mind. He looks happy, and Touya thought deep down that, perhaps if time and fortune and fortitude allowed, he wouldn't mind being the one to show N how precious these things he must have never had truly are.
Touya doesn't know how to ask or bring it up because when N is happiest, his normally-sad eyes flicker to life with something beautiful behind them, as if all of his fears and woes and guilts have disappeared and he has the answer he's been looking for, and Touya can never find it in himself to break this heavenly illusion.
Until he can gather the strength to say so, Touya is content to watch N stare into the distance blankly or swipe at his lifeless grey eyes with the back of his hand when he thinks he's alone; he'll take what he can get because even if he doesn't think N is heartless, N doesn't quite believe it himself and sometimes there will be hurt and contempt and indignation in his features when Touya tries to understand. He reaches and reaches and reaches but parts of N are still locked away somewhere, walking on clouds and humming madly with his ears closed.
It breaks his heart and makes him hopeful all at once, but the beauty and the love are truly there, simmering gently and waiting to boil over and overflow. N can find happiness and touches upon it every once and awhile, and as Touya watches N lift Victini into the air, their laughter filling the atmosphere with something warm and spring-like, he believes more than anything that he will be able to make N understand how wonderful being loved is.